baber/WOPTO huggingface dataset:
Patent KR-900003470-B1 (KR)
Title: High concentration sodium permanganate etch batch and its use in desmearing and/or etching printed circuit boards
Inventor: KRULIK GERALD
IPC: C23C18/22
Filed: 1986-05-30
Granted: 1990-05-19
Abstract: An aq. alkaline liq. soln. consists of water, at least 75 g/l NaM3O4 and sufficient NaOH for all Mn residueto be removed from the surface of material contacted with the soln. by acid neutralisation. A resinous substrate (e.g. epoxy/fibre glass) is prepd. for metallisation by contacting it with the soln. for desmearing resin from the inside walls of holes, cleaning holes of a multilayer circuit board or etching back the surface of the circuit board. Pref. soln. contains 75-400 (pref. 100-200 esp. 160) g/l NaM3O4 and 40-400 (pref. 40-150, esp. 60) g/l NaOH. The soln. effectively and rapidly removes resin smears and provides controlled etchback e.g. to expose conductors in a multilayer board.
Patent KR-900006297-B1 (KR)
Title: Process for the controlling of a injection moulding machne and apparatus therefor
Inventor: KANEKO TOSHIHIKO
IPC: B29C45/76
Filed: 1986-08-05
Granted: 1990-08-28
Abstract: A method of controlling a machine, having a mobile part which is advanced and retracted into and out of contact with a stationary part during machine operation, includes issuing a deceleration instruction to the drive of the mobile part at a time during its advance determined by a relationship between the actual speed of the mobile part and an anticipated distance between a deceleration commencement position and a stop position so that the speed of the mobile part is reduced to zero at the time of contact with the stationary part.
Patent KR-900003436-B1 (KR)
Title: Apparatus and method for producing spherical dough products
Inventor: DASIRO YASNORI
IPC: A21C11/10
Filed: 1986-09-03
Granted: 1990-05-19
Abstract: Appts. for shaping an item comprising outer cover and inner filling, e.g. dough crust with filling material, comprises at least three mutually contacting and circumferentially spaced cutters, movable radially to sever a leading portion from a cylinder comprising plastic outer cover and inner filling. The cutters have inclined inner cutting edges defining a central apperture which is completely closed as the cutters slide inwardly to sever the leading portion from the cyinder.
Patent KR-890003393-B1 (KR)
Title: Battery charge supplier
Inventor: KILL TAE-KYU
IPC: H02J9/00
Filed: 1986-11-01
Granted: 1989-09-19
Abstract: The supply comprises a means for charging the battery utilizing a low signal generated by a comparator (IC1) for turning on the transistor (Q1) when the charging voltage is lower than charging voltage limit, a means for quitting the charge utilizing a hgih signal generated by the comparator (IC1) for turning off the transistor when the charged voltage reaches to the charging voltage limit, and a means for quitting the discharge utilizing a high signal generated by a comparator (IC2) for turning off the transistor (Q2) for preventing the overdischarge.
Patent KR-900005559-B1 (KR)
Title: Electrolyte for electrolytic capacitor
Inventor: SHINOZAKI FUMIHIKO
IPC: H01G9/022
Filed: 1986-11-04
Granted: 1990-07-31
Abstract: An electrolyte for an electrolytic capacitor contains a hexafluorophate of organic amine cpd. of formula (I) as a solute in an aprotic solute. In (I), m is 0 or 1; m+n is 2 or 3; R1 indicates the (non)presence of C1-3 alkyl substituent; R is H or N- heterocyclic-di-condensed ring cpd. in which a N atom forms a tert. or quat, amine with one or two C1-5 alkyl gps. and the ring contains 0-5 conjugated double bonds.
Patent KR-890004109-B1 (KR)
Title: Small size cmos adding tools
Inventor: O GWANG-SOK
IPC: G06F7/50
Filed: 1986-12-06
Granted: 1989-10-20
Abstract: The circuit reducing the number of necessary transistors and logic gates comprises AND gates (G1-3) receiving two inputs out of inputs (x,y,z), a NOR gate (G4) receiving each output of the AND gates, an inverter (G5) providing a carry signal (C) of the three inputs, an AND gate (G6) and an OR gate (G7) receiving the three inputs, an AND gate (G8) receiving the outputs of the (G4) and (G7), a NOR gate (G9) receiving the outputs of the (G6) and (G8), and an inverter (G10) providing the sum value of the three inputs.
Patent KR-910001329-B1 (KR)
Inventor: SADOO ISAO
IPC: G11B7/00
Filed: 1986-12-18
Granted: 1991-03-04
Abstract: 내용 없음.
Patent KR-900004845-B1 (KR)
Title: Making process for high-tensile steel
Inventor: LEE JONG-SUB
IPC: C21D8/02
Filed: 1986-12-29
Granted: 1990-07-08
Abstract: The method is characterised by heating steel slab to over 1150 deg. C, hot-rolling at 950-1000 deg. C start-rolling temperature and 890- 950 deg. C finish-rolling temperature, quenching after reheating to 900-950 deg.C, and tempering at 640-660 deg. C. The steel slab consists of (in wt.%) 0.05-0.2% C, 0.08-1.0% Si, 0.4-3% Mn, 0.1-1.0% W, up to 0.005% S, up to 0.016% P, up to 0.005% N, 0.001-0.1% Ca, at least two elements selected from group consisting of up to 0.8% Cu, up to 3.0% Ni, up to 3.0% Cr, up to 1.0% Mo and up to 0.1% V, and at least one element selected from group consisting of up to 0.1% Al, up to 0.1% Ti and up to 0.006% B.
Patent KR-900002244-B1 (KR)
Title: Monosuifactams
Inventor: SUNDEEN JOSEPH E
IPC: C07D277/38
Filed: 1987-01-05
Granted: 1990-04-07
Abstract: 1-Sulphato-2-azetidinone derivs. of formula (I) and their salts are prepared.  In (I), R1 and R2 are each H or alkyl; R1 and R2  together form -(CH2)n [n=2-6 ; R3 and R4 are each H or C1-3 alkyl.  (I) are useful for antibacterial agents against grampositive and gram- negative bacteria.
Patent KR-950005327-B1 (KR)
Title: Artificial absorbable ligament prosthesis
Inventor: BENICEWICZ BRIAN C
IPC: A61L27/18
Filed: 1987-04-02
Granted: 1995-05-23
Abstract: An absorbable ligament and tendon prosthesis is disclosed. The prosthesis is made from a polymer of L(-)lactide and may contain up to 10% glycolide as a comonomer. The polymerization mass includes an organo metallic catalyst present in a monomer to catalyst mole ratio of from 10,000 to 50,000 and a monofunctional alcohol, as an end cap, in a monomer to alcohol mole ratio of from 600 to 1400 to 1. The filaments of the prosthesis have diameters of from 3 to 15 microns and the total diameter of the prosthesis is between 20 and 80 mils.
Patent KR-890003331-B1 (KR)
Title: Process for preparing microcapsulated diclefenac sodium
Inventor: HO JAE-DOO
IPC: A61K31/165
Filed: 1987-05-09
Granted: 1989-09-18
Abstract: A microcapsulation of diclofenac sodium is prepared.  Thus, 1 part of diclofenac sodium was mixed with 0.5-1.5 part of gelatin to give crude microcapsules (size=630-2212  m), which were treated with formalin-isopropyl alcohol for 6-12 hr to give final products.
Patent KR-960000086-B1 (KR)
Inventor: KITE JOSEPH KELLERS
IPC: D04C1/02
Filed: 1987-05-12
Granted: 1996-01-03
Abstract: 내용 없음.
Patent KR-910002452-B1 (KR)
Inventor: ARAI HAJIMAE
IPC: H01L21/28
Filed: 1987-09-05
Granted: 1991-04-22
Abstract: 내용 없음.
Patent KR-910003742-B1 (KR)
Inventor: INUZIMA TAKASHI
IPC: C23C16/56
Filed: 1987-09-05
Granted: 1991-06-10
Abstract: 내용 없음.
Patent KR-900004173-B1 (KR)
Title: Frequence detective circuit by setting width
Inventor: SONG WOONG-HO
IPC: G01R23/15
Filed: 1987-11-12
Granted: 1990-06-18
Abstract: The discriminator operated by setting the band width comprises a synchronous signal generator (1) receiving input freq. (fV) and reference freq. (fR) and providing synchronous signls (01, 02), dividers for setting the lower limit (2) and the upper limit (3), band setting circuits for lower limit (4) and the upper limit (5), a freq. band setting circuit (6), a synchronous pulse counter (7), and an output circuit (8). The input freq. is converted to the frequency synchronised with the reference freq. and pulses with same freq. to use the freq. band discrimination.
Patent KR-950010093-B1 (KR)
Inventor: GOTZ-PETER BLUMBACH
IPC: B60K11/08
Filed: 1988-02-03
Granted: 1995-09-07
Abstract: 내용 없음.
Patent KR-950014560-B1 (KR)
Inventor: MIZUSHI NAOGI
IPC: G11C16/16
Filed: 1988-03-09
Granted: 1995-12-05
Abstract: 내용 없음.
Patent KR-970004553-B1 (KR)
Inventor: GEORGY ERNEST MICHAEL
IPC: H01B12/00
Filed: 1988-03-15
Granted: 1997-03-29
Abstract: 요약 없음
Patent KR-940005110-B1 (KR)
Inventor: SUGAWARA HITOSHI
IPC: C08G85/00
Filed: 1988-03-25
Granted: 1994-06-11
Abstract: 내용 없음.
Patent KR-900005298-B1 (KR)
Title: Making method for lmc of glaze
Inventor: CHANG SUK-LIM
IPC: C08B11/12
Filed: 1988-04-30
Granted: 1990-07-27
Abstract: A method for producing carboxy methyl cellulose (CMC) comprises (a) introducing CMC powder as a binder into water of 70-80 deg. C, (b) stirring and dissolving the CMC in the propeller mixer to be 1.65-2.0 of viscosity, (c) introducing 0.2-0.3% of the dissolved CMC soln. to 100% of glaze, and (d) mixing and crushing it for 4-8 hr. The CMC gives a good surface treatment of high pressure insulating porcelains.
Patent KR-930001643-B1 (KR)
Title: Magnetic tape driving device for drum head
Inventor: YU DO-HWAN
IPC: G11B5/54
Filed: 1988-08-31
Granted: 1993-03-08
Abstract: The device for simultaneously rotating drum head and magnetic tape, improves the speed of read/write function without regard  to the rotating speed of the tape. The tape of pile reel (1)  passing through upper bearing edge guide (3), is guided  to  machine  reel (2) via a button sensor (7), drum head  (6),  lower  bearing  edge guide (4). The button sensor has a tape servo guide (5),  and  the drum head has a write head (W)(W'), read heat (R)(R'), erase  head (E)(E'), head selecting sensors (HS1-HS4). The servo guide (5)  is controlled by write read inable signal (WT)(RT) via OR gate (OR1), and  buffers  (B1-B4)   are   controlled   by   selecting   signal (WS)(W'S)(RS)(R'S) via AND gates (AND1-AND4).
Patent KR-960014560-B1 (KR)
Inventor: MINEMATSU HIROYUKI
IPC: C08L51/00
Filed: 1988-10-14
Granted: 1996-10-16
Abstract: 내용 없음.
Patent KR-950011092-B1 (KR)
Inventor: UCHIMURA SHOJI
IPC: B28B1/26
Filed: 1988-11-30
Granted: 1995-09-28
Abstract: 내용 없음.
Patent KR-910000031-B1 (KR)
Title: Electric wire automatic cutting equipment
Inventor: PARK JAE-SUNG
IPC: B26D5/08
Filed: 1988-12-31
Granted: 1991-01-19
Abstract: The apparatus detects a length  of  wire  automatically,  and cuts wire at the designated length  automatically.  The  apparatus includes wire drum (1) and wire unwinding device (2) for unwinding wire (3), wire guide  (4) for guiding wire in a certain direction, feed detectign device (5) for detecting  the  unwinded  length  of wire, wire cutting device (6)  winding device (7) for winding  the cut wire and dropping the winded roll to a   pallet,  wire   gudie system (8), electric circuits for driving each of the devices.
Patent KR-930001403-B1 (KR)
Inventor: KANG WON-CHOL
IPC: H03H9/46
Filed: 1989-12-29
Granted: 1993-02-27
Abstract: 내용 없음.
Patent KR-910006933-B1 (KR)
Inventor: YAMASAKI AEIJO
IPC: A23L17/40
Filed: 1989-01-09
Granted: 1991-09-14
Abstract: 내용 없음.
Patent KR-930011703-B1 (KR)
Inventor: MORAN CABIN E
IPC: G01N21/89
Filed: 1989-02-22
Granted: 1993-12-18
Abstract: 내용 없음.
Patent KR-0172594-B1 (KR)
Inventor: BONANNI ROCCO
IPC: G02B6/42
Filed: 1989-02-28
Granted: 1999-05-01
Abstract: 공지되는 것은 광섬유들과 구성요소들을 정밀하게 중심 맞추는 접속자 및 그 제조 방법이다. 주 표면들이 서로 접촉하여 놓여진 2개의 블록을 포함하는 프롱내에 각각의 광섬유가 배치된다. 각각의 블록에는 광섬유들을 수용하기 위해 주 표면으로 형성된 홈들의 어레이를 갖는다. 한 쌍의 갚은 홈들이 또한 각 블록의 대향 단면에서 각 주 표면에 형성됨과 동시에 경사진 단면 표면을 형성하도록 홈들의 어레이로서 형성된다. 안내 로드들이 경사진 표면에 마주 대향하여 배치되어 그 로드들이 광섬유들과 직선을 이룬다.
Patent KR-940009375-B1 (KR)
Inventor: KUBOHIRO YUKI
IPC: G04C3/14
Filed: 1989-04-18
Granted: 1994-10-07
Abstract: 내용 없음.
Patent KR-940008899-B1 (KR)
Inventor: BRENNER STANLEY S
IPC: H02B1/04
Filed: 1989-09-11
Granted: 1994-09-28
Abstract: 내용 없음.
Patent KR-940006945-B1 (KR)
Inventor: GARDELLA CAMERON
IPC: F16C19/52
Filed: 1989-07-27
Granted: 1994-07-30
Abstract: 내용 없음.
Patent KR-950004371-B1 (KR)
Inventor: KOBLER ROBERT J
IPC: H01R24/50
Filed: 1989-08-04
Granted: 1995-04-28
Abstract: 내용 없음.
Patent KR-920001658-B1 (KR)
Title: Method of supplying timing control for power detergent
Inventor: LEE HWAN
IPC: D06F33/02
Filed: 1989-08-16
Granted: 1992-02-21
Abstract: The  driving  state  of  a  detergent  inputting  motor   is discriminated from the output signals of a detecting section, and, when the driving is  arrested,  the  inputting  of  the  detergent halts. When  the  driving  of  the  motor  is  not  arrested,  the detergent is inputted for a pre-set period of time. The  detecting section detects the  driving  speed  of  the  detergent  inputting motor, and the detected value is combined with the  pre-set  value to decide the detergent inputting time. The solidification of  the detergent is detected to prevent  the  burning-off  of  the  motor caused by the solidification.
Patent KR-0154525-B1 (KR)
Inventor: CLINTON VIRGIL KOPP
IPC: B01D69/08
Filed: 1989-11-10
Granted: 1998-11-16
Abstract: 내용없음
Patent KR-950007760-B1 (KR)
Inventor: YOKO TERUAKI
IPC: B21D7/024
Filed: 1989-11-13
Granted: 1995-07-18
Abstract: 내용 없음.
Patent KR-0139910-B1 (KR)
Inventor: NELSON RICHARD VICTOR
IPC: C08K5/3477
Filed: 1989-12-14
Granted: 1998-12-01
Abstract: 내용 없음.
Patent KR-0168398-B1 (KR)
Inventor: GOPALAN BALA SUBRAMANIAN
IPC: C07D207/22
Filed: 1989-12-29
Granted: 1999-03-20
Abstract: 내용없음.
Patent KR-0159083-B1 (KR)
Inventor: IFE ROBERT JOHN
IPC: C07D215/20
Filed: 1989-02-20
Granted: 1998-12-01
Abstract: 내용 없음.
Patent KR-960016408-B1 (KR)
Title: Communication processor for a packet switched network
Inventor: MAKRIS PERRY
IPC: H04L12/56
Filed: 1989-12-01
Granted: 1996-12-11
Abstract: A packet switch receives data and processes it for assembly into packages. A bus allows communication between each of the data processing units of the switch and one or more storage units for storing the data packets. Arbitration for deciding which of the processing units will be granted access to the bus is performed by a system which selectively and alterably designates any of at least two different levels of priority of access to the bus for each of the processing units, and the relative percentages of time of access for the different priorty levels. The system assures greater access to the bus by those of the processing units having the higher level of priority. If communication is provided by two buses, the requests for access are alternated between them. The arbitration system provides selective access to the bus in any of a plurality of bus cycles including a read cycle, a write cycle and a read/modify/write cycle, and grants a request for access from a higher priority processing unit within one bus cycle.
Patent KR-0154857-B1 (KR)
Inventor: WATT KIM J
IPC: G05B19/05
Filed: 1989-04-11
Granted: 1998-11-16
Abstract: 본 발명은 개별적으로 작용하는 프로그램가능한 논리 제어기(PLC)의 동작 속도 보다 더 빠른 속도로 동작할 수 있는 다수의 프로그램가능한 논리 제어기의 상호접속 영상 메모리부(interconnecting image memory portions)에 관한 것이다. 
     본 발명에 있어서, 고속의 피어-대-피어 프로그램가능한 논리 제어기(peer-to-peer PLC) 네트워크(21)는, 다수의 프로그램가능한 논리 제어기(PLCs), 및 상기 다수의 PLC 각각에 접속되어 외부 소자는 물론 상기 각각의 다수 PLC 사이에서 통신을 제공하기 위한 통신 네트워크(20)를 구비하고, 상기 다수의 PLC 각각은, 상기 다수의 PLC에 대응하는 다수의 메모리 블록을 갖는 상태 및 제어 정보를 기억하기 위한 다중 포트 영상 메모리(16)와, 상기 다중 포트 영상 메모리(16)와 상기 통신 네트워크(20) 사이에서 데이타를 전송하기 위해 일련의 명령을 연속적으로 실행하기 위한 제어 프로세서(12)를 포함하며, 상기 고속의 피어-대-피어 PLC 네트워크는, 상기 다수의 PLC 각각에 접속되어 상기 다수의 PLC 각각의 사이에서 데이타를 전달하기 위한 고속의 메모리 전송 네트워크(17)를 더 구비하며, 상기 각각의 PLC는 상기 영상 메모리의 개별적인 갱신을 가능하게 하도록 상기 고속의 메모리 전송 네트워크(17)를 통하여 상기 다수의 PLC 상호간에 상기 다수의 메모리 블록 각각으로부터 상기 다수의 메모리 블록 각각으로 데이타를 전송하기 위한 통신 프로세서(18)를 포함하며, 상기 전송은 상기 제어 프로세서(12)의 동작 및 상기 통신 네트워크(20)와 관련없이 발생하는 것을 특징으로 한다.
Patent KR-0171575-B1 (KR)
Title: Cassette loading mechanism for a recording and reproducing apparatus
Inventor: TOYOGUCHI TSUTOMU
IPC: G11B15/675
Filed: 1990-02-08
Granted: 1999-04-15
Abstract: A recording and/or reproducing apparatus for recording and/or reproducing information signals with the use of a tape cassette (300) is provided with a pair of reel shafts (6, 7), each having an engaging member (6b, 7b) mounted with a bias towards the end of the supporting shaft, and a tape cassette transfer mechanism adapted for shifting the tape cassette inserted by way of the cassette inserting opening (2a) in a first direction normal to the reel shafts and guiding or loading the tape cassette for inserting and engaging the reel shafts with a pair of tape reels (302, 303) within the tape cassette. When at least the tape cassette transfer mechanism is set at a position facing the cassette inserting opening, the tape cassette is moved by the tape cassette transfer mechanism towards the proximal side of reel shafts, to reduce the displacement in the second direction of the tape reel of the tape cassette by the tape cassette transfer mechanism to a value lesser than the thickness of the tape cassette to reduce the thickness of the apparatus. After completion of the tape cassette loading by the tape cassette transfer mechanism, the tape cassette is partially exposed to the cassette inserting opening to prevent a second tape cassette from being introduced into the cassette inserting opening after completion of loading of the first-mentioned cassette.
Patent KR-100210994-B1 (KR)
Inventor: WONG ALAN
IPC: G11B19/02
Filed: 1990-05-29
Granted: 1999-07-15
Abstract: 본 발명은 오디오 콤팩트 디스크와 같은 광학 디스크로부터 디지털 데이터를 재생하는 광학 디스크 재생 장치에 관한 것이며, 그 중에서도, 진동 등에 기인하여 트랙 점프가 발생될지라도 연속적인 재생 출력이 발생될 수 있는 그러한 장치에 관한 것이다. 본 발명에 따른 광학 디스크 재생 장치에 관하여, 광학 디스크로부터 검출된 디지털 데이터가 RAM에 순차적으로 기록된 후 순차 판독하여, 트랙 점프가 생긴 경우에도 그 RAM에 기억된 데이터가 연속 판독되어, 연속적인 재생 출력을 얻는다. 다른 한편, 광학 디스크를 조사하는 광 스풋이 트랙 점프로부터 본래 위치로 복귀한 후 소정의 기간 동안 상기 광학 디스크를 고속으로 재생하여 디지털 데이터를 RAM에 보충하도록 한다.
Patent KR-960005876-B1 (KR)
Inventor: HORIE TAKAO
IPC: B22C25/00
Filed: 1990-10-18
Granted: 1996-05-03
Abstract: 내용 없음.
Patent KR-930006905-B1 (KR)
Title: Food recognition apparatus in electronic range
Inventor: LEE IN-KYU
IPC: H05B6/64
Filed: 1990-10-31
Granted: 1993-07-24
Abstract: The apparatus, included in the microwave oven, recognizes the food by  use  of  spectrum  characteristics,  temporarily  sets  a cooking period according to the food weight,  and  determines  the cooking finish time  according  to  the  sensed  temperature.  The apparatus comprises a lamp (4) irradiating light to  the  food;  a colour sensor  (3)  detecting  the  natural  colour  of  the  food according  to  the  wave  length  reflected  from  the   food;   a temparature sensor (1) detecting the temperature of the discharged air; an AD converter digitizing  the  analogue  signals  from  the above sensors; a microprocessor (9) generating control signals;  a circuit (12) for actuating a magnetron (30), a cooling  fan  (29), the lamp (4) and a rotational table motor (28).
Patent KR-970011066-B1 (KR)
Title: Electronic device mounter
Inventor: HA MAN-KIL
IPC: H05K13/04
Filed: 1990-12-28
Granted: 1997-07-05
Abstract: Automatic inserting device for electronic element in order to insert the electronic element on the PCB without stopping regardless of miss-inserting, but miss-inserting part is marked. The said device consists of a cylinder that drop the rod in case of intercepting the current of the driver tip and the clinch, a store means that includes the ink, and a marking means that marks the miss-inserting part.
Patent KR-930003706-B1 (KR)
Title: Method for interfacing input and output in computer system
Inventor: CHOE YONG-BOK
IPC: G06F11/00
Filed: 1990-12-31
Granted: 1993-05-08
Abstract: The severeneww of faults of a duplicated system are  detected by self tests and a currently operating system is switched to  the other system when faults are  severe.  The  method  comprises  the steps: (A) executing self  tests;  (B)  transmitting  system  fail signal to a MPMA (1) when errors are  detected;  (C)  switching  a system to a stand-by system when errors are detected and otherwise waiting to receive initialization  instruction;  (D)  initializing chips and memories; (E) setting  initialization  error  flag  when error occurs during initialization process and  waiting  for  next initialization instruction; (F) repeating the step (D) and (E) for a certain times; and (G) switching a system to a  stand-by  system when errors occur during the step (F).
Patent KR-950012947-B1 (KR)
Inventor: MURAKAMI MASAKI
IPC: H03B5/32
Filed: 1991-04-10
Granted: 1995-10-23
Abstract: 내용 없음.
Patent KR-960005321-B1 (KR)
Inventor: NAKANO ASAO
IPC: H01L27/01
Filed: 1991-04-22
Granted: 1996-04-23
Abstract: 내용 없음.
Patent KR-960009886-B1 (KR)
Inventor: SAKUMA YUJI
IPC: G11B23/113
Filed: 1991-06-03
Granted: 1996-07-24
Abstract: 요약 없음
Patent KR-930011627-B1 (KR)
Title: Method and product of manufacturing steel pipe
Inventor: LEE YUN-HYONG
IPC: C22C38/00
Filed: 1991-08-24
Granted: 1993-12-16
Abstract: A method for producing the steel tube comprises; (a) removing an alien substance with which a welding portion of the steel plate is stained; (b) injecting an inactive gas of 3-6  kg/cm2  pressure around welding region; (c) heating a weld  zone  of  welded  steel tube to 890-980 deg.C of more than A3  transformation  point;  and (d) normalizing the heated  weld  zone  to  obtain  a  homogeneous deplex structure of ferrite and pealite. The steel  tube  includes (in wt.) up to 0.3 % C, up to 0.35 % Si, up to 1.60 %  Mn,  up  to 0.025 % P, up to 0.005  %  S,  0.01-0.06  %  Nb,  0.01-0.05  %  V, 0.01-0.05 % Al, 0.001-0.30 % Cu, 0.001-0.008 % Ca and  balance  Fe with inevitable impurities.
Patent KR-100225440-B1 (KR)
Inventor: YASUDA YOSHIHIRO
IPC: H04N9/455
Filed: 1991-12-18
Granted: 1999-10-15
Abstract: [목적] 
     샘플링 클럭을 컬러 버스트 신호에 위상 동기시킬 때, 종래, 필요했던 D/A 변환기 및 그에 부수하는 회로 블록에 대해서 매우 간단한 구성으로 실현한다. 따라서, 상술의 D/A 변환기 및 그에 부수하는 회로 블록을 불필요로 함과 동시에 외부 부착하지 않고 샘플링 블록을 컬러 버스트 신호에 동기시키는 기능을 갖는 회로 블록을 IC화할 수 있다. 
     [구성] 
     이웃하는 2 라인의 복조된 색차 신호(R-Y)의 컬러 버스트 신호에 대응하는 부분을 디지탈적으로 가산함으로써 샘플링 클럭의 컬러 버스트 신호에 대한 위상 어긋남의 방향과 정도를 검출한다. 샘플링 클럭이 컬러 버스트 신호와 위상 동기하고 있으면, 색차 신호(R-Y)의 컬러 버스트 신호에 대응하는 기간에서는 색차(R-Y)의 성분은 발생하지 않는다. 그러나, 상술 위상 동기하고 있지 않는 경우에는 색차 신호(R-Y)의 컬러 버스트 신호에 대응하는 기간에 색차 신호(D-Y)의 성분이 출력된다. 따라서, 이 색차 신호(R-Y)의 위상의 극성과 위상차의 크기를 구함으로써 컬러 버스트 신호에 대한 샘플링 클럭의 위상 어긋남의 방향과 정도를 PWM 신호로서 구할 수 있다. 이 정보에 기준해서 샘플링 클럭(SCK)의 위상을 제어한다.
Patent KR-960006999-B1 (KR)
Inventor: HAYASHI KANJI
IPC: B23K9/025
Filed: 1991-12-20
Granted: 1996-05-27
Abstract: 내용 없음.
Patent KR-940003463-B1 (KR)
Title: Method of glass ceramic having a crystalline phase
Inventor: JONG JAE-WAN
IPC: C03C10/02
Filed: 1991-12-31
Granted: 1994-04-22
Abstract: The abrasion resistant crystallized glass is manufactured by (a) mixing 50-75 wt.% andesite, 15-30 wt.% dolomite, 5-10 wt.% silica sand refined byproduct, 1-4 wt.% borax and adding 1-6 wt.% the nucleant, (b) heating and melting the mixture at 1300-1450 deg.C for 1 hr., (c) molding and releasing the molten glass, and crystallizing at 600-1000 deg.C. The nucleant materials are mixture with two or four components of titania, chromium oxide, calcium fluoride, zirconium silicate etc. The composition of crystallized glass comprises 35-55 wt.% silica, 10-16 wt.% alumina, 5.0-8.5 wt.% ferric oxide, 0.5-2.5 wt.% boron oxide, 10-18 wt.% calcium oxide, 5-15 wt.% magnesium oxide, 0.5-3.0 wt.% sodium oxide, 0.5-3.0 wt.% potassium oxide and 0.1-1.0 wt.% manganese oxide.